2020-05-02 02:16:49 +00:00
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package main
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import (
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"bytes"
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"encoding/base64"
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"flag"
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"fmt"
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"html"
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"log"
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"net/http"
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"net/url"
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"regexp"
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2020-05-02 03:19:58 +00:00
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"sort"
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2020-05-02 02:16:49 +00:00
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"strings"
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"github.com/BurntSushi/toml"
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2020-05-24 06:39:24 +00:00
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"golang.org/x/sync/semaphore"
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2020-05-02 02:16:49 +00:00
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)
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type Config struct {
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BindTo string
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Gitea struct {
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2020-05-24 06:39:24 +00:00
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URL, Org string
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MaxConnections int64
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2020-05-02 02:16:49 +00:00
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}
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2020-05-05 07:30:28 +00:00
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Redirect map[string]string
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2020-05-02 02:16:49 +00:00
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Template struct {
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AppName string
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HomepageHeaderHTML string
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CustomLogoPngBase64 string
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}
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}
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type Application struct {
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cfg Config
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rxRepoPage, rxRepoImage *regexp.Regexp
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2020-05-24 06:39:24 +00:00
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apiSem *semaphore.Weighted
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2020-05-02 02:16:49 +00:00
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}
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func (this *Application) Templatepage(w http.ResponseWriter, r *http.Request, pageDesc, extraHead string, cb func()) {
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pageTitle := this.cfg.Template.AppName
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if pageDesc != "" {
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pageTitle = pageDesc + ` | ` + pageTitle
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}
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w.Header().Set(`Content-Type`, `text/html; charset=UTF-8`)
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w.WriteHeader(200)
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fmt.Fprint(w, `<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta charset="UTF-8">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<meta name="viewport" content="width=960">
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<title>`+html.EscapeString(pageTitle)+`</title>
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`+extraHead+`
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<link rel="shortcut icon" href="/static/logo.png" type="image/png">
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<link rel="apple-touch-icon" href="/static/logo.png" type="image/png">
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<link type="text/css" rel="stylesheet" href="/static/style.css">
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</head>
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<body>
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<div id="container">
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<div id="content">
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<h1><a href="/"><div id="logo"></div>`+html.EscapeString(this.cfg.Template.AppName)+`</a></h1>
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`)
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cb()
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fmt.Fprint(w, `
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</body>
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<script type="text/javascript" src="/static/site.js"></script>
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</html>
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`)
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}
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func (this *Application) internalError(w http.ResponseWriter, r *http.Request, err error) {
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log.Printf("%s %s: %s", r.Method, r.URL.Path, err)
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http.Error(w, "An internal error occurred.", 500)
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}
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func (this *Application) Homepage(w http.ResponseWriter, r *http.Request) {
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2020-05-24 06:39:24 +00:00
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ctx := r.Context()
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repos, err := this.repos(ctx)
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2020-05-02 02:16:49 +00:00
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if err != nil {
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this.internalError(w, r, fmt.Errorf("listing repos: %w", err))
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return
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}
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topics := make(map[string][]string)
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for _, repo := range repos {
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2020-05-24 06:39:24 +00:00
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if t, err := this.topicsForRepo(ctx, repo.Name); err == nil {
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2020-05-02 02:16:49 +00:00
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topics[repo.Name] = t
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}
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}
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2020-05-02 03:19:58 +00:00
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// Sort repos once alphabetically, to get alphabetical indexes...
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sort.Slice(repos, func(i, j int) bool {
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return repos[i].Name < repos[j].Name
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})
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alphabeticalOrderIndexes := make(map[string]int, len(repos))
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for idx, repo := range repos {
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alphabeticalOrderIndexes[repo.Name] = idx
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}
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// But then make sure the final sort is by most-recently-created
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sort.Slice(repos, func(i, j int) bool {
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return repos[i].CreatedAt.After(repos[j].CreatedAt)
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})
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2020-05-02 02:16:49 +00:00
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// Ready for template
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this.Templatepage(w, r, "", "", func() {
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fmt.Fprint(w, `
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2020-05-02 03:19:58 +00:00
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`+this.cfg.Template.HomepageHeaderHTML+`
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<select id="sortorder" style="float:right;">
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<option value="data-sort-al">Alphabetical</option>
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<option value="data-sort-ls">Lifespan</option>
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<option value="data-sort-ct" selected>Recent projects</option>
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<option value="data-sort-mt">Recent updates</option>
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</select>
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2020-05-24 06:39:32 +00:00
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<h2>Projects <small>(`+fmt.Sprintf("%d", len(repos))+`)</small></h2>
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2020-05-02 02:16:49 +00:00
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<table id="projtable-main" class="projtable">
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`)
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for _, repo := range repos {
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pageHref := html.EscapeString(`/` + url.PathEscape(repo.Name))
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normalisedDesc := repo.Description
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normalisedDesc = strings.TrimRight(repo.Description, `.`)
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if len(normalisedDesc) > 0 {
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// Lowercase the first letter of the description, unless it starts with an acronym (all letters uppercase first word) or CamelCase word
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firstWord := strings.SplitN(normalisedDesc, " ", 2)[0]
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isAcronymOrCamelCase := len(firstWord) > 1 && (firstWord[1:] != strings.ToLower(firstWord[1:]))
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if !(isAcronymOrCamelCase || firstWord == `Go`) {
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normalisedDesc = strings.ToLower(normalisedDesc[0:1]) + normalisedDesc[1:]
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}
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// Add leading `<COMMA><SPACE>` to separate from the repo title
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normalisedDesc = `, ` + normalisedDesc
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}
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rowClass := ""
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for _, topic := range topics[repo.Name] {
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rowClass += `taggedWith-` + topic + ` `
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}
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fmt.Fprint(w, `
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2020-05-02 03:19:58 +00:00
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<tr
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class="`+html.EscapeString(rowClass)+`"
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data-sort-al="`+fmt.Sprintf("-%d", alphabeticalOrderIndexes[repo.Name])+`"
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data-sort-ls="`+fmt.Sprintf("%.0f", repo.UpdatedAt.Sub(repo.CreatedAt).Seconds())+`"
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data-sort-ct="`+fmt.Sprintf("%d", repo.CreatedAt.Unix())+`"
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data-sort-mt="`+fmt.Sprintf("%d", repo.UpdatedAt.Unix())+`"
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>
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2020-05-02 02:16:49 +00:00
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<td>
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2020-05-04 06:15:04 +00:00
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<a href="`+pageHref+`"><img class="homeimage" loading="lazy" src="`+html.EscapeString(`/:banner/`+url.PathEscape(repo.Name))+`"></div></a>
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2020-05-02 02:16:49 +00:00
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</td>
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<td>
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<strong>`+html.EscapeString(repo.Name)+`</strong>`+html.EscapeString(normalisedDesc)+`
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<a href="`+pageHref+`" class="article-read-more">more...</a>
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<br>
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<small>
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`)
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for _, topic := range topics[repo.Name] {
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fmt.Fprint(w, `<a class="tag tag-link" data-tag="`+html.EscapeString(topic)+`">`+html.EscapeString(topic)+`</a> `)
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}
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fmt.Fprint(w, `
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</small>
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</td>
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</tr>
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`)
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}
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fmt.Fprint(w, `
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</table>
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`)
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})
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}
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func (this *Application) Bannerpage(w http.ResponseWriter, r *http.Request, repoName string) {
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2020-05-24 06:39:24 +00:00
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ctx := r.Context()
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2020-05-02 02:16:49 +00:00
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2020-05-24 06:39:24 +00:00
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images, err := this.imageFilesForRepo(ctx, repoName)
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2020-05-02 02:16:49 +00:00
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if err != nil {
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this.internalError(w, r, fmt.Errorf("listing images: %w", err))
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return
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}
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if len(images) == 0 {
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w.Header().Set(`Location`, `/static/no_image.png`)
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w.WriteHeader(301)
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return
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}
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w.Header().Set(`Location`, images[0].RawURL)
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w.WriteHeader(301)
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}
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func (this *Application) Repopage(w http.ResponseWriter, r *http.Request, repoName string) {
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2020-05-24 06:39:24 +00:00
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ctx := r.Context()
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2020-05-02 02:16:49 +00:00
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repoURL := this.cfg.Gitea.URL + url.PathEscape(this.cfg.Gitea.Org) + `/` + url.PathEscape(repoName)
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extraHead := ""
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2020-05-24 06:39:24 +00:00
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readme, err := this.repoFile(ctx, repoName, `README.md`)
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2020-05-02 02:16:49 +00:00
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if err != nil {
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this.internalError(w, r, fmt.Errorf("loading README.md: %w", err))
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return
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}
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lines := strings.Split(string(readme), "\n")
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// We add some extra badges based on special text entries
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extraBadgesMd := ` `
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extraBadgesMd += ` [](` + repoURL + `)`
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// Inject more badges to 3rd line; or, create badges on 3rd line if there are none already
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if len(lines) >= 3 && strings.Contains(lines[2], `shields.io`) {
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lines[2] += ` ` + extraBadgesMd
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} else {
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// Push other lines down
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lines = append([]string{lines[0], lines[1], extraBadgesMd, ""}, lines[2:]...)
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}
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2020-05-24 06:39:24 +00:00
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readmeHtml, err := this.renderMarkdown(ctx, repoName, strings.Join(lines, "\n"))
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2020-05-02 02:16:49 +00:00
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if err != nil {
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this.internalError(w, r, fmt.Errorf("rendering markdown: %w", err))
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return
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}
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2020-05-24 06:39:24 +00:00
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images, err := this.imageFilesForRepo(ctx, repoName)
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2020-05-02 02:16:49 +00:00
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if err != nil {
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this.internalError(w, r, fmt.Errorf("listing images: %w", err))
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return
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}
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// If the Git repository contains a top-level go.mod file, allow vanity imports
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2020-05-24 06:39:24 +00:00
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if goMod, err := this.repoFile(ctx, repoName, `go.mod`); err == nil {
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2020-05-02 02:16:49 +00:00
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// Check the first line should be `module MODULENAME\n`
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firstLine := bytes.SplitN(goMod, []byte("\n"), 2)[0]
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if bytes.HasPrefix(firstLine, []byte("module ")) {
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moduleName := firstLine[7:]
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extraHead = `<meta name="go-import" content="` + html.EscapeString(string(moduleName)) + ` git ` + repoURL + `.git">`
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}
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}
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// De-escalate all headers in rendered markdown to match our style
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repl := strings.NewReplacer(`<h1`, `<h2`, `<h2`, `<h3`, `<h3`, `<h4`,
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`</h1>`, `</h2>`, `</h2>`, `</h3>`, `</h3>`, `</h4>`)
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// Ready for template
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this.Templatepage(w, r, repoName, extraHead, func() {
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projBodyclass := `projbody`
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if len(images) > 0 {
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projBodyclass += ` projbody_halfw`
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}
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fmt.Fprint(w, `<div class="projinfo"><div class="`+projBodyclass+`">`)
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repl.WriteString(w, string(readmeHtml))
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fmt.Fprint(w, `</div>`)
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if len(images) > 0 {
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fmt.Fprint(w, `<div class="projimg">`)
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for _, img := range images {
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fmt.Fprint(w, `<a href="`+html.EscapeString(img.RawURL)+`"><img alt="" class="thumbimage" src="`+html.EscapeString(img.RawURL)+`" /></a>`)
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}
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fmt.Fprint(w, `</div>`)
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}
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fmt.Fprint(w, `<div style="clear:both;"></div>`)
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fmt.Fprint(w, `</div>`) // projbody
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})
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}
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func (this *Application) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if r.Method == `GET` {
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if r.URL.Path == `/` {
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this.Homepage(w, r)
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} else if r.URL.Path == `/favicon.ico` {
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w.Header().Set(`Location`, `/static/logo.png`)
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w.WriteHeader(301)
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} else if r.URL.Path == `/robots.txt` {
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http.Error(w, "not found", 404)
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} else if parts := this.rxRepoImage.FindStringSubmatch(r.URL.Path); parts != nil {
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this.Bannerpage(w, r, parts[1])
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} else if parts := this.rxRepoPage.FindStringSubmatch(r.URL.Path); parts != nil {
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2020-05-04 05:18:57 +00:00
|
|
|
|
|
|
|
|
// Support /repo.html URIs for backward compatibility
|
|
|
|
|
if strings.HasSuffix(parts[1], `.html`) {
|
|
|
|
|
w.Header().Set(`Location`, r.URL.Path[0:len(r.URL.Path)-5])
|
|
|
|
|
w.WriteHeader(301)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// The regexp supports an optional trailing slash
|
|
|
|
|
// Redirect to canonical no-trailing-slash
|
|
|
|
|
if strings.HasSuffix(r.URL.Path, `/`) {
|
|
|
|
|
w.Header().Set(`Location`, `/`+parts[1]) // n.b. parts[1] isn't urldecoded yet
|
|
|
|
|
w.WriteHeader(301)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
2020-05-05 07:30:19 +00:00
|
|
|
// Proper decoding of special characters in repo path component
|
|
|
|
|
repoName, err := url.PathUnescape(parts[1])
|
|
|
|
|
if err != nil {
|
|
|
|
|
http.Error(w, "malformed url encoding in repository name", 400)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
2020-05-05 07:30:28 +00:00
|
|
|
// Maybe it's a redirected project (alternative name)
|
|
|
|
|
if rename, ok := this.cfg.Redirect[repoName]; ok {
|
|
|
|
|
w.Header().Set(`Location`, `/`+url.PathEscape(rename))
|
|
|
|
|
w.WriteHeader(301)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
2020-05-05 07:30:19 +00:00
|
|
|
this.Repopage(w, r, repoName)
|
2020-05-02 02:16:49 +00:00
|
|
|
|
|
|
|
|
} else if r.URL.Path == `/static/logo.png` {
|
|
|
|
|
if this.cfg.Template.CustomLogoPngBase64 != "" {
|
|
|
|
|
|
|
|
|
|
logoPng, err := base64.StdEncoding.DecodeString(this.cfg.Template.CustomLogoPngBase64)
|
|
|
|
|
if err != nil {
|
|
|
|
|
this.internalError(w, r, fmt.Errorf("parsing base64 logo: %w", err))
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
w.Header().Set(`Content-Length`, fmt.Sprintf("%d", len(logoPng)))
|
|
|
|
|
w.Header().Set(`Content-Type`, `image/png`)
|
|
|
|
|
w.WriteHeader(200)
|
|
|
|
|
w.Write(logoPng)
|
|
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
r.URL.Path = r.URL.Path[8:]
|
|
|
|
|
http.FileServer(http.Dir(`static`)).ServeHTTP(w, r)
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
} else if strings.HasPrefix(r.URL.Path, `/static/`) {
|
|
|
|
|
r.URL.Path = r.URL.Path[8:]
|
|
|
|
|
http.FileServer(http.Dir(`static`)).ServeHTTP(w, r)
|
|
|
|
|
|
2020-05-05 07:41:26 +00:00
|
|
|
} else if r.URL.Query().Get("go-get") == "1" {
|
|
|
|
|
// This wasn't one of our standard `/repo` paths, but there is the ?go-get=1 parameter
|
|
|
|
|
// It must be a subpackage request
|
|
|
|
|
// We can't serve the proper go-import meta tag immediately because
|
|
|
|
|
// we haven't looked up the go.mod yet. Just redirect to the root
|
|
|
|
|
// package - `go get` will follow redirects and the resulting meta tag is correct
|
|
|
|
|
|
|
|
|
|
slashParts := strings.SplitN(r.URL.Path, `/`, 3) // len === 3 is guaranteed from earlier if cases
|
|
|
|
|
|
|
|
|
|
w.Header().Set(`Location`, `/`+slashParts[1])
|
|
|
|
|
w.WriteHeader(301)
|
|
|
|
|
return
|
|
|
|
|
|
2020-05-02 02:16:49 +00:00
|
|
|
} else {
|
|
|
|
|
http.Error(w, "not found", 404)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
http.Error(w, "invalid method", 400)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func main() {
|
|
|
|
|
app := Application{
|
|
|
|
|
rxRepoPage: regexp.MustCompile(`^/([^/]+)/?$`),
|
|
|
|
|
rxRepoImage: regexp.MustCompile(`^/:banner/([^/]+)/?$`),
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
configFile := flag.String(`ConfigFile`, `config.toml`, `Configuration file in TOML format`)
|
|
|
|
|
flag.Parse()
|
|
|
|
|
|
|
|
|
|
_, err := toml.DecodeFile(*configFile, &app.cfg)
|
|
|
|
|
if err != nil {
|
|
|
|
|
panic(err)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Assert Gitea URL always has trailing slash
|
|
|
|
|
if !strings.HasSuffix(app.cfg.Gitea.URL, `/`) {
|
|
|
|
|
app.cfg.Gitea.URL += `/`
|
|
|
|
|
}
|
|
|
|
|
|
2020-05-24 06:39:24 +00:00
|
|
|
// Create semaphore
|
|
|
|
|
if app.cfg.Gitea.MaxConnections == 0 { // unlimited
|
|
|
|
|
app.apiSem = semaphore.NewWeighted(99999)
|
|
|
|
|
} else {
|
|
|
|
|
app.apiSem = semaphore.NewWeighted(app.cfg.Gitea.MaxConnections)
|
|
|
|
|
}
|
|
|
|
|
|
2020-05-02 02:16:49 +00:00
|
|
|
log.Fatal(http.ListenAndServe(app.cfg.BindTo, &app))
|
|
|
|
|
}
|
